R5 Mark ii with lens RF100-400mm F5.6-8 IS USM - Every now and then fails to achieve AF

[lwatawala]

Camera: R5 Mark II ( Camera Firmware Ver 1.0.2)
Lens:      RF 100 - 400mm F5.6 - 8 IS USM (Lens Firmware Ver 1.0.3)

Every now and then, this Camera/Lens combination fails to achieve AF.

I'm using AF-ON back button with the following settings:
      AF start position : Manual selection
      AF operation : SERVO
      AF Area : Around
      Whole area tracking servo AF : ON
      Subject to detect : Animal
      Eye detection : AUTO
      Servo AF characteristics : M

I can't say for sure, but it may be getting in to this situation after the camera goes through an auto power off (not consistently)

One way I have been able correct this situation is by turning the camera  OFF and ON.

Anyone has experienced this? Any suggestions on how I can prevent this from happening.

Thanks.

[lwatawala]

Added Info: Most of the time the camera achieves AF with no issues. I haven't tested this scenario with other RF lenses

[deebatman316]

Check and see if "Lens Drive when AF is Impossible" is Enabled in the camera menu. If not the camera will give up and stop trying focus.

[Waddizzle]

Welcome to the community.  We are going to need a lot more information about your issue in order to help you.  Please, tell us how to reproduce the issue. 

Photos or videos?

What are you trying to focus on?  Is it moving?

How far away is the subject?  Does the subject fill the frame?

Describe the lighting conditions. 

That’s a good start.  I’ll stop here.  Feel free to add any additional information that you feel could be relevant and helpful.